Rugbrød (Danish pronunciation: [ˈʁuˌb̥ʁœðˀ]) (Danish rye bread) is a very commonly used bread in Denmark. The common rugbrød usually resembles a long brown extruded rectangle, no more than 12 cm high, and 30–35 cm wide, dependent upon the bread pan in which it is baked. The ingredients typically include rye flour, cracked or chopped rye kernels and seeds such as sunflower seeds, linseeds or pumpkin seeds. Sourdough is almost always the base because commercial yeasts are unsuitable.